Quote Originally Posted by Ken Nadvornick View Post
Another very simple mitigation for the head/carrier interface is to go a hobby shop and get a sheet of adhesive-backed black felt. (It's not real felt these days, but just as good for this use.) Then use your trimmer to cut a long strip about 1/8th inch wide. Take that strip and stick it all the way around the underside rim of the condenser housing (this is also where the round cold light cans reside).

The effect is that when you lower the head directly onto the carrier top, the felt seals up the slightly imperfect fit very effectively. On my D5XL there is absolutely no leakage from this location. And a nice side effect is that if you're equipment-anal like me, the felt prevents any marking up of your nice clean carrier tops, especially if they're white enameled.

And again for the inverse problem, I've used this same felt to seal up the interface between the camera body and bellows mounting frame on my 8x10 (a like-new restored Calumet C1). Had light leaks before. Has absolutely none now.

Thanks Tkamiya for asking and Ken this sounds like a good idea.

When I used my Omegalite, there was a spongy foam interface between lamphead and negative carrier. I modified this sticky foam by covering it with some thin black 1.1 silnylon (leftover from some DIY backpacking gear projects).

But I recently switched to an Aristo Grid lamphead which uses a traditional condenser housing. I noticed that greenish light spilling out pretty dramatically... So I am looking for this same idea. Didn't want to use "felt" because I didn't want dust. But this is exactly what I was thinking would be required.